On February 5, 1897, the state of Indiana almost declared pi as "5/4 to 4" or 3.2. While it's fairly common for governmental bodies to legislate weights and measures, this shows that the Indiana Legislature doesn't understand the concept of irrational numbers. It's the irrational part that makes pi so great, in the first place. Coverage of this event includes:

• From the “squaring-the-circle dept.” at Slashdot
• The bill itself, courtesy of Purdue
• Richland College attempts to analyze the claim objectively
• Wired Magazine has the full story